<template>
  <nav-bar>
    <div slot="left" class="back">
      <img src="~assets/img/common/back.svg" alt="" @click="backClick">
    </div>
    <div slot="center" class="title">
      <div v-for="(item, index) in titles" class="title-item"
           :class="{active: currentIndex === index}"
           @click="titleClick(index)">{{item}}</div>
    </div>
  </nav-bar>
</template>

<script>
  import NavBar from "components/common/navbar/NavBar"
  export default {
    name: "DetailNavBar",
    components: {
      NavBar
    },
    data(){
      return {
        titles: ['商品', '参数', '评论', '推荐'],
        currentIndex: 0
      }
    },
    methods: {
      titleClick(index){
        this.currentIndex = index
        this.$emit('navClick', index)
      },
      backClick(){
        this.$router.back()
      }
    }
  }
</script>

<style scoped>
.title{
  display: flex;
  font-size: 13px;
}
.title-item{
  flex: 1;
}
.active{
  color: var(--color-high-text);
}
.back img{
  margin-top: 10px;
}
</style>